The chart shows a clear improvement in energy efficiency across the ten lowest-performing U.S. states between 2020 and 2025, though they still remain behind national standards. West Virginia records the lowest index in 2020 at 55, increasing to 60 by 2025. Alabama follows with a rise from 57 to 62, while Louisiana improves from 58 to 64. Arkansas moves from 59 to 65, and Mississippi from 60 to 66, reflecting gradual modernization of outdated energy systems. Kentucky and South Carolina advance to 67 and 68, respectively, while Oklahoma and Tennessee climb to 69 and 70. Indiana, which had the highest index among this group in 2020 at 65, reaches 71 by 2025. Although all states show consistent upward trends, their relatively low starting points highlight persistent infrastructural and policy challenges impacting energy efficiency.
| Labels | Energy Efficiency Index 2020 | Energy Efficiency Index 2025 |
|---|---|---|
| West Virginia | 55 | 60 |
| Alabama | 57 | 62 |
| Louisiana | 58 | 64 |
| Arkansas | 59 | 65 |
| Mississippi | 60 | 66 |
| Kentucky | 61 | 67 |
| South Carolina | 62 | 68 |
| Oklahoma | 63 | 69 |
| Tennessee | 64 | 70 |
| Indiana | 65 | 71 |
